What is cleistogamy ? Write one advantage and one disadvantage of it, to the plant.

Explanation

### Step-by-Step Solution:

1. **Definition of Cleistogamy**:
Cleistogamy refers to a type of self-pollination that occurs in certain plants where the flowers do not open. This means that the pollen from the male parts of the flower fertilizes the female parts of the same flower without the need for external pollinators or opening of the flower.

2. **Advantage of Cleistogamy**:
One significant advantage of cleistogamy is that it allows plants to reproduce in unfavorable conditions. Since the flowers do not open, the plant can ensure self-pollination even when environmental factors (like lack of pollinators or adverse weather) make cross-pollination difficult. This ability to propagate itself ensures the survival of the species.

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